MG
The Classic Marque

I’ve found some photos of the deposits.

The heater valve was quite badly corroded, despite only being fitted for four years.

Coolant will crystalize if the engine sits for a long time without being started and having the opportunity to heat up and mix within the cooling system: its basically caused by additives/chemicals in the coolant dropping out of suspension and solidifying. It can also be caused by mixing different, incompatible coolants, and while there are some coolants specifically recommended for aluminum radi...

Nigel

Terry Horler’s book ‘Original Sprite & Midget’ is a very useful book to understand the production history and standard specification of these cars from 1959 to 1979. https://www.herridgeandsons.com/original-sprite-midget This helps determine which mark you are looking at and to what degree it has still had the period correct bits on it for the mark and year from engine size, ...

Dr J.E.Davies
I haven’t seen or heard from Dr Davies in a while. I donated a dynamo for him to repair and sell on as he donates to the RNLI.

Having a damaged dynamo pulley that I wanted to fit to aDynamator I bored out the centre and sleeved but then needed to cut the keyway. Dr D kindly cut the keyway as he held the appropriate tooling. I would certainly have a go at restoring that re...

Dr John E Davies checked out by rev counter reduction gearbox as part of his rebuild of my dynamo and control box. I am not sure what spares are available.

Cheers
Mike

That does remind me to check the heater valve.
I think as the antifreeze solution weakens, or it is a weak solution to begin with, it is more likely to crystalise. Or attack aluminium.
I have not used my car for a few years and did not replace the antifreeze.
The deposits are hard to remove. A quick test with rad flush and hot water did not remove them. Perhaps a prolonged test would.

Malc, ive bought the Mamba kit last year to replace my Frontline mk1 kit.
Im going this route for the triangulation like Rob says.

Also bought "adjustable" MGB dampers to fidle arround to see what setting feels best for me.

Sadly been to buisy to start putting it in, hopefully this winter.

Door to Door did a good job at a reasonable price for me 13 years ago. Jud

I had a similar problem with my B, a couple of years ago.

I stayed with my brother the night before MGB60 and in the morning, the temp was only about 5°C and the windows were misted. I put the heater on, but only got cold air.

Anyway, when I got it home, I investigated. The heater tap was furred up with crystals, as were the hoses. I did a cooling system flush with either Radf...

I have a leveller so should be able to do that. Bonnet will be of as well of course. It's ages since I've done an enginer...15 years maybe.